1. Department of Obstetrics and Gynecology; Women's Hospital; Tehran University of Medical Sciences; Tehran
2. Department of Obstetrics and Gynecology; Faculty of Medicine; Zabol University of Medical Sciences; Zabol
3. Department of Obstetrics and Gynecology; Faculty of Medicine; Hormozgan University of Medical Sciences; Bandar-Abbas
4. Department of Obstetrics and Gynecology; Faculty of Medicine; Lorestan University of Medical Sciences; Khoramabad Iran